#app {
  /* 取消固定宽度和居中、flex布局 */
  width: auto;
  min-width: 0;
  max-width: none;
  margin: 0;
  display: block;
  flex-direction: unset;
  align-items: unset;
}
.header-bg {
  width: 2560px !important;
  margin: 0 auto !important;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  display: flex;
  justify-content: center;
}
.header {
  width: 2560px !important;
  min-width: 2560px !important;
  max-width: 2560px !important;
  margin: 0 auto !important;
  padding: 0 32px;
  height: 72px;
  background: #fff;
  display: flex;
  flex-direction: row;
  align-items: center;
}